Kompletteringssystem for produksjon av hydrokarboner fra en formasjon som omgir et borehull, fremgangsmåte for komplettering av en undergrunnsbrønn for gassløftet fluidekstraksjon og fremgangsmåte for produksjon av hydrokarboner fra en formasjon nær en brønnboring.

摘要

Devices and methods for methods for cleaning of excess cement from a production assembly as well as from the annulus surrounding the production assembly. A hydrostatic closed circulation valve (HCCV) assembly is described that is primarily actuatable between open and closed positions by varying hydraulic pressure in the flowbore of the production assembly. The valve assembly is useful for selectively circulating working fluid into the annulus from the flowbore of the production assembly.